Hi folks, Any Brits on the list got experience of hooking devices with standard BT plugs to the TDM400P? The TDM400P has the RJ11/RJ45 socket but I'm not sure if a standard adapter will do the trick or if we need to consider ring capacitors etc. Any links to buy the stuff would also be appreciated. Cheers, Simon -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20030527/5a5ca95e/attachment.htm
I haven't used it but I am sure the US to UK converter thats available from maplin (www.maplin.co.uk) should work..
Hi Richard, So is a PBX style the equivalent of a straightforward adapter or is there more to it than that? I noticed last night that our analogue phones actually have RJ11 sockets that the BT<>RJ11 lead plugs into so I hooked one of them up with an RJ11<>RJ11 modem lead but got nothing. Am I doing something eternally dumb? Cheers, Simon ----- Original Message ----- From: "Richard Alexander" <R.Alexander@interlynx.us> To: <asterisk-users@lists.digium.com> Sent: Tuesday, May 27, 2003 11:37 PM Subject: RE: [Asterisk-Users] TDM400P > BT> > >My question, is do they need to be Master, Slave or PBX type ? > > The PBX style is just a Master without the test resistor & surge > protector - it is meant for internal cabling. A PBX style is probably > fine for the first connection. If you daisy chain other connectors they > should be slaves. > > Be aware that US and UK line levels are different. Be prepared to adjust > gain settings accordingly if you connect UK style handsets. CallerID > will not be displayed on BT style caller id devices. Email me for a UK > phone number if you want a chat. > > > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users >
The PBX style has the capacitor to make the "bell" line but does not have the test resistor or surge (lightning) protector. Some RJ11 style modem leads are just straight US phone leads (middle two pins connected and reversed between connectors) but some use different pins on the connector at one end. Perhaps you have one of them. What are you planning to connect to the TDM400P ultimately. Connect to patch panel? Directly to cable runs, or to phones in same room?
Hi, I've found this thread in the archives and am currently planning to connect my digium kit to a BT landline and also connect a normal UK phone respectively. I've seen a couple of people asking about it but not the answers. My question is - do I need a modtap (listed at maplin.co.uk as BT to RJ45 adapters) full master with line protection, pabx master without line protection or a pabx slave socket. --or-- can I just use a straight-thru rj11 cable for the handset and a straight-thru rj11<>bt modem cable for the line? Matthew -- Outgoing mail is certified Virus Free. Checked by AVG Anti-Virus (http://www.grisoft.com). Version: 7.0.176 / Virus Database: 260.1.4 - Release Date: 29/09/2003
If shorting two FXS lines together damages them they are badly designed. Good BORSCHT (battery, over-voltage protection, ringing, signaling, hybrid, and test) design should mean they can tolerate this kind of thing. They have to very often in the poorly controlled PSTN rats nest. Regards, Steve Mark Spencer wrote:>Just to be perfectly clear here. You *never* plug two FXS devices >together unless you for some reason do not wish them to ever work again. > >Mark > >
> If shorting two FXS lines together damages them they are badly designed. > Good BORSCHT (battery, over-voltage protection, ringing, signaling, > hybrid, and test) design should mean they can tolerate this kind of > thing. They have to very often in the poorly controlled PSTN rats nest.Generally speaking, 90V A/C out-of-phase from two ringing FXS interfaces is not a good thing (and yes, our SLICS do support BORSCHT). Mark